Please create an account to participate in the Slashdot moderation system


Forgot your password?

Comment Missing Option (Score 1) 392

You guys don't see that this kind of practice is legal in other countries, which is why it is probably pretty widespread behaviour. So the most important result is that rules are tightened in other countries.
And "the persons responsible" for this scandal are at the moment the ones who missed that the US regulations are more strict on cheating of these tests.

Comment Re:Evidence of the Great Filter? (Score 1) 365

They only tested for really advanced civilisations, that are harnessing energy on a galactic scale. A civilisation building a Dyson Sphere is only Type 2 since it only harvests the energy of a whole star. Maybe these things are just impossible, or no civilisation sees a reason to do this.

Comment It is not scientific to define the result before (Score 1) 125

The project should be aimed at understanding the Arctic and how it changes. It should not only look for possible problems, but also how the Arctic will adapt and cope with it. By setting the vulnerabilities as a topic this research is defined to be one-sided.

Comment Re:not fucking close (Score 1) 147

I don't think Biosphere 2 is a good model for a space trip. We need simplified engineered ecosystems that are optimized for food and oxygen production and low weight. Something more like the plant farms running on the ISS at the moment. It makes no sense to replicate Earth ecosystems.

Comment Re:Can the enemy actually shoot down the F35? (Score 1) 732

There are lots of reports about radar technologies that can penetrate stealth, since years. All you need is a radar system that does not rely on its own sender. It can work with mobile tower signals, the new Eurofighter radar will work with TV station signals afaik. It also works with multiple planes flying in formation, detecting the radar reflection from the other plane's senders. The Serbian radar system just used a longer wavelength than usual, that was already enough to penetrate stealth of the F117. Upgrading older planes with stealth-penetrating radar is also much cheaper than building a fleet of stealth fighters.

Comment Re: Looking more and more likely all the time... (Score 1) 518

Sorry ,that is rubbish. The cars don't move anymore due to friction, they would still move if it was the collision of spaceships for example. And impulse is not just a mathematical construct, it is an important quantity in physics. The conservation of impulse is used to make mechanical calculations. It gives additional constraints to the conservation of energy, and there is no other conserved entity that gives these contraints.

Comment Re: Looking more and more likely all the time... (Score 1) 518

Ok. It violates the conservation of momentum in classical physics, since there are no virtual particles in this. And I think in quantum mechanics the impulse of virtual particles is going somewhere normally. If pairs of virtual antiparticles form the sum of their impulses is zero. Virtual photons can exchange an impulse between charged particles. They take up an impulse and give it to another particle, but I think impulse does not disappear or come out of nothing.

In space, no one can hear you fart.